Mitsubishi Heavy Industries FD 8 Series User manual

FDT 8/8 Cassette Performance and Engineering data Page 1
FDT 8/6 Cassette Performance and Engineering data Page 2
FDT Cassette Installation Page 3
FDT Cassette Space Collars Page 5
FDT Cassette Engineering drawings Page 6
Remote Control RCD Wired controller Page 9
RCD Group Control and set up Page 10
Operation, Error Codes Page 11
FDEN 8/8 Ceiling Performance and Engineering data Page 12
FDEN 8/6 Ceiling Performance and Engineering data Page 13
FDEN Ceiling Installation Page 14
FDEN Ceiling Engineering drawings Page 15
FDKN 8/8,6 Wall Performance and Engineering data Page 17
FDKN Wall Installation Page 18
FDKN Wall Engineering drawings Page 19
Remote Control Infra-red Controller Page 22
Refrigerant Pipework Installation Page 23
Low Ambient Control Installation Page 24
Electrical Site Wiring Installation Page 25
Time Clock/BMS Adaptor Wiring adaptor to CnT connection Page 25
SCADE Superlynk adaptor Page 26
Condensate Drains Installation Page 27
FDC Outdoor Units Installation Page 29
FDC Outdoor Units Engineering Drawings Page 31
Multi Systems Specification & Installation Page 38
Safety Information Back Cover
FD 8 Series Split Systems
CONTENTS

FDT - 8 Series (Cassette)
FDC - 8 Series (Outdoor)
1
SYSTEM REFERENCE 2088 2588 3088 3088
(
3
p
h
)
4088 5088
PERFORMANCE
Cooling performance nom. (1) KW 5.00 5.70 7.10 7.10 10.00 12.50
Cooling U K Conditions (2) KW 4.80 5.47 6.82 6.82 9.60 12.00
Sensible Cooling UK (3) KW 3.51 4.05 5.05 5.05 6.91 8.28
Heating Performance (HP only) KW 5.40 6.10 8.00 8.00 11.20 14.00
ELECTRICAL DATA
System Power connection Mains to outdoor unit first. Interconnecting wiring - 3 wires + Earth, for cooling, 5 wires + Earth, for Heat Pump
Run current - cooling A 8.1 9.4 14.4 5.5/ph 8.1/ph 10.3/ph
Start current max. L RA A 44 51 95 45/ph 53/ph 74/ph
Recommended Fuse Rating (Local) (5) A 20 30 30 15/ph 15/ph 20/ph
INDOOR UNIT ref: FDT 8 Series FDT208 FDT258 FDT308 FDT308 FDT408 FDT508
Dimension - Unit H x W x D mm 215 x 700 x 700 260 x 840 x 840 320 x 840 x 840
Net Weight kg 23 30 30
30
34 36
Fan Specification Turbo Fan x 1
Motor Rating W 30 x 1 25 x 1 30 x 1 30 x 1 80 x1 130 x 1
Airflow (6) High / low speed m 3/s 0.23 / 0.16 0.26 / 0.18 0.28 / 0.20 0.28 / 0.20 0.43 / 0.31 0.46 / 0.33
Sound level at 1 m below unit high / low dBA 38 / 33 39 / 35 41 / 35 41 / 35 48 / 40 49 / 43
Safety Control Internal thermostat for fan motor. Frost protection thermostat.
Condensate Lift Pump – Max lift (7) mm 700 700 700 700 700 700
Condensate Connection Size o.d. mm 25 25 25 25 25 25
FreshAir Inlet facility Inlet facility on all models
ExhaustAir Duct facility Branch duct facility on all models
Refrigerant Control Capillary tube.
Pipe Termination Sizes o.d. ins 5/8 5/8 5/8 5/8 3/4 3/4
o.d. ins 1/4 3/8 3/8 3/8 3/8 3/8
Filter Long life filter x 1(Washable)
Remote Control (wired) Multi function wired controller with alternative temperature sensor
OUTDOOR UNIT ref: FDC 8 FDC208 FDC258 FDC308 FDC308
(
3
p
h
)
FDC408
(
3
p
h
)
FDC508
(
3
p
h
)
TECHNICAL DATA
Dimension - Unit H x W x D mm 690 X880 X845 X880 X340 1050X920 X340 1250 X920 X340
Net Weight kg 49 55 74 74 90 101
Fan Specification Propeller Fan x 1 Propeller Fan x 2
Motor Rating W 55 X1 55 X1 55 X1 55 X1 40 X2 65 X2
Sound level at 1 metre in front dBA 52 52 52 52 54 55
Refrigerant type R22 OR R407C
Refrigerant factory charge R22 / R407C kg 0.98 / 0.98 1.1 / 1.2 1.4 / 1.75 1.4 / 1.75 1.7 / 2.12 1.9 / 2.58
REFRIGERANT PIPING
Pipe Termination Sizes o.d. ins 5/8 5/8 5/8 5/8 3/4 3/4
o.d. ins 1/4 3/8 3/8 3/8 3/8 3/8
Maximum pipe run m 30 30 50 50 50 50
Max height diff. Outdoor unit above / below m 30 / 15 30 / 15 30 / 15 30 / 15 30 / 15 30 / 15
NOTES 1 Nominal cooling rated at ISO-A, JIS B8616 Outdoor: 35oC DB / 24oC WB Indoor: 27oC DB / 19oC WB
2 U K Cooling Outdoor: 30oC DB / 20oC WB Indoor: 23oC DB / 17oC WB
3 Sensible Cooling calculated at UK conditions, at standard air volume.
4 Heating Performance rated at: Outdoor 7oC DB / 6oC WB Indoor: 20oC DB
5 Recommendations are for supply to outdoor unit. Use motor rated fuse or MCB. Requirement may vary depending on site conditions.
6 CEN & HEN = 1ph CES & HES = 3ph.
7 Condensate lift measured from ceiling line.
8 Cooling only systems available in R22 models 2088 & 2588. Cooling only available with R22 FDC 6 Series outdoor units, and all R407C FDC 8 Series.
Technical data for R22 and R407C Systems
30
290

2
FDT - 8 Series (Cassette)
FDC - 6 Series (Outdoor)
SYSTEM REFERENCE 3086 3086 (3ph) 4086 5086
PERFORMANCE Note
Cooling performance nom. (1) KW 7.10 7.10 10.20 12.50
Cooling UK Conditions (2) KW 6.82 6.82 9.79 12.00
Sensible Cooling UK (3) KW 5.05 5.05 7.05 8.28
Heating Performance (HP only) KW 7.30 7.30 10.50 12.80
ELECTRICAL DATA
System Power connection Mains to outdoor unit first. Interconnecting wiring - 3 wires + Earth, for cooling, 5 wires + Earth, for Heat Pump
Run current - cooling A 16.3 6.0/ph 7.5/ph 10.0/ph
Start current max. L RA A 89 43/ph 45/ph 68/ph
Recommended Fuse Rating (Local) (5) A 30 15/ph 15/ph 20/ph
INDOOR UNIT ref: FDT 8 Series FDT308 FDT308 FDT408 FDT508
Dimension - Unit H x W x D mm 260 x 840 x 840 320 x 840 x 840
Net Weight kg 30 30 34 36
Fan Specification Turbo Fan x 1
Motor Rating W 30 x 1 30 x 1 80 x 1 130 x 1
Airflow (6) High / low speed m 3/s 0.28 / 0.20 0.28 / 0.20 0.43 / 0.31 0.46 / 0.33
Sound level at 1 metre below high / low dBA 41 / 35 41 / 35 48 / 40 49 / 43
Safety Control Internal thermostat for fan motor. Frost protection thermostat.
Condensate Lift Pump – Max lift (7) mm 700 700 700 700
Condensate Connection Size o.d. mm 25 25 25 25
FreshAir Inlet facility Inlet facility on all models
ExhaustAir Duct facility Branch duct facility on all models
Refrigerant Control Capillary tube.
Pipe Termination Sizes o.d. ins 5/8 5/8 3/4 3/4
o.d. ins 3/8 3/8 3/8 3/8
Filter Long life filter x 1(Washable)
Remote Control (wired) Multi function wired controller with alternative temperature sensor
OUTDOOR UNIT ref: FDC 6 FDC306 FDC306
(
3
p
h
)
FDC406
(
3
p
h
)
FDC506
(
3
p
h
)
Dimension - Unit H x W x D mm 844 X950 X340 1250 X950 X340
Net Weight kg 69 69 86 91
Fan Specification Propeller Fan x 1 Propeller Fan x 2
Motor Rating W 60 X1 60 X1 60 X2 60 X2
Sound level at 1 metre in front dBA 56 56 57 59
Refrigerant R22 ONLY
Refrigerant factory charge kg 1.3 1.3 1.6 2.3
REFRIGERANT PIPING
Pipe Termination Sizes o.d. ins 5/8 5/8 3/4 3/4
o.d. ins 3/8 3/8 3/8 3/8
Maximum pipe run m 30 30 30 30
Max height diff. Outdoor unit above / below m 15 15 15 15
NOTES 1 Nominal cooling rated at ISO-A, JIS B8616 Outdoor: 35oC DB / 24oC WB Indoor: 27oC DB / 19oC WB
2 U K Cooling Outdoor: 30oC DB / 20oC WB Indoor: 23oC DB / 17oC WB
3 Sensible Cooling calculated at UK conditions, at standard air volume.
4 Heating Performance rated at: Outdoor 7oC DB / 6oC WB Indoor: 20oC DB
5 Power supply to outdoor unit. Use motor rated fuse or MCB. Requirement may vary depending on site conditions.
6 CEN & HEN = 1ph CES & HES = 3ph.
7 Condensate lift measured from ceiling line.
8 Cooling and heat pump systems available in R22 models 2088 & 2588.
Technical data for R22 and R407C Systems

3
Installation of FDT (Cassette)
Application
The unit is designed for most commercial applications,
i.e. shops, offices, gyms, meeting rooms, bars, restaurants,
etc. It should not be installed in an area contaminated by
oil, chemicals, or an area with steam or excessive humidity,
or hazardous substances, i.e. flammable gases, vapours,
resins, thinners, petroleum, acids.
Do not install adjacent to equipment generating magnetic
waves or high frequency signals, as the generated noise
may cause equipment malfunction.
Unit location
Select a suitable location within the room to allow
optimum air distribution to all parts of the conditioned
space. The minimum distance from a wall or obstruction
is 1000mm.
The unit should be located so as not to cause draft
disturbance to a person located directly in the path of
the air discharge.
Installation space
Preparation for installation
A pattern cardboard sheet is enclosed with the packing,
indicating the ceiling opening size, and the required
position of the hanging bolts. Check measurements with
the drawings, and make opening.
Fix suspension bolts (4 no. M8 or M10 – supplied by installer)
into the building construction, in the required positions.
The bolts and fixings must have a minimum resistive force
of 50kg. The suspension bolts should be cut to length,
to finish approximately 70mm above ceiling line.
Unit installation
Lift the unit into position, central within the opening, and
secure with nuts and washers on the suspension bolts,
adjusting unit height using the level gauge provided.
Ensure pipe terminations are correctly positioned, facing in
the right direction. Use a spirit level to ensure unit is horizontal.
Condensate piping
The FDT cassette includes a condensate lift pump, capable
of pumping upwards 700mm above the ceiling line. It is
important to keep within this limit.
The lift should be installed vertically from the drain
outlet. If installed at an incline, this should not deviate
more than 100mm from the vertical (see piping diagram).
This is to prevent too much water being contained in
the vertical lift, which would flood back to the unit and
overflow when the power is switched off.
The pipe termination is of rigid pvc, 25mm o.d. A short
length of flexible connection is provided in the installation
kit, together with a circular clip, terminating in 25mm
i.d. (32mm o.d.) connection.
Please refer to page 23 Condensate Drain Installation &
Recommendations.
Unit Location
avoiding obstruction
Dimensions mm
Refrigerant piping
Drain
Level gauge
Fix the level gauge in
alignment with the face of
the supply air grille. Adjust
the suspension nuts so that
the guage is level with
lower surface of ceiling.
Dimension ‘A’ mm
FDT 208 45-47
FDT 258 - 508 40-45
Ceiling
member Level gauge (insulation)
1000
1000
Obstacle or more
or more
Recommended floor
to ceiling height
Recommended
minimum ceiling
void space
minimum
maximum
FDT 208
FDT 258, 308
FDT 408, 508
2250mm
3600mm
225mm
270mm
330mm
See also space collar installation for restricted height ceiling voids

4
Fascia panel fixing
•Check the unit is level, using the level gauges provided.
•Screw two of the fixing bolts into two diagonally
opposed sockets.
•Locate the panel onto the bolts, and insert the two
remaining bolts.
•Fix the panel only in the position indicated in the
packed instructions, i.e. with all four air outlets
correctly aligned, otherwise there will be air leakage.
Fresh air intake
The FDT cassette includes an aperture in one corner for
the introduction of fresh air. A small knock out is provided
in the corner section of the unit (in one position only). The
position and dimensions are shown on the drawing below.
The fresh air inlet is on the suction side of the turbo fan,
and will draw in a small quantity of fresh air, provided
the inlet duct is not longer than 5 metres. The inlet duct
should have a cross section area of at least 750mm2.
Where a fan is used to provide a small positive pressure for
the fresh air intake, it is essential the volume of air does
not exceed 10% of the air volume of the unit. Too much
fresh air entering the unit will result in excessive noise.
RCD remote control
installation (wired type)
Please refer to page 8 for RCD installation
instructions and customise settings.
Remote control
(wireless infra-red type)
The FDTN version of the 8 Series cassette systems is
supplied with an infra-red controller. A wall mounted
bracket is provided. For operational details, please refer
to page 18.
Branch duct
It is possible to deliver a proportion (20% max) of the
conditioned air to a small adjacent area using a branch
duct connection to the side of the FDT cassette unit.
The branch duct can be connected at positions on four
sides of the unit. There are knock-out sections, allowing
the installer to make an opening to suit the size of the
connecting duct. The suggested size for the branch duct
is 150mm dia. or similar.
Where a fan is used to provide a positive pressure for
the branch duct, the air volume should not exceed 20%
of the unit air volume.
Safety Warning: Refer to safety data on back cover of this manual
Further Information
Space collar installation page 5
Refrigerant piping installation page 19
Electrical wiring installation page 21
Condensate drain installation page 23
Outdoor unit installation & location page 25
Remote control RCD set up page 8
Group control set up page 9
Superlynk network SCA-DE interface page 22
Fresh air
entry
position
Branch
duct - four
positions
Condensate
drain Refrigerent pipe connections
1
3
2
4
Cassette Unit
viewed from above
The facia panel can
be rotated on it’s
locating screws to
allow accurate
alignment with the
ceiling grid
Branch duct to
adjacent room
Fresh air inlet duct
connection to
corner of unit

5
Installation of FDT Space Collar
For installation of FDT cassette in restricted height ceiling voids
The SPACE COLLAR is used to provide a decorative enclosure
for the FDT cassette where the unit protrudes below the
level of the ceiling. This allows cassette units to be installed
where there is a restricted ceiling void.
The space collar is available in different heights, to allow
for the space available within the ceiling void. The collars
are precision moulded in glass fibre reinforced plastic,
colour textured to match the light grey cassette fascia
panel. The ceiling tiles can be installed resting on top of
the finished edge of the collar, leaving a neat finish to
the installation.
NOTE: It is important to make provision for the connection
of refrigerant piping and condensate drain, which may
be restricted where there is a minimal ceiling void.
The height of the space collar must be specified at the
time of ordering. The model reference of the FDT cassette
must also be specified.
Structural
Ceiling
Suspended
Ceiling
Space Collar
Cassette
Fascia
This dimension to
be specified at
time of ordering
The space collar height is to be specified by the installer.
The cut edge of the ceiling tiles can be concealed above
the top edge of the space collar to provide a neat finish

6
FDT Cassette 208
(1) Indoor unit
Models FDTN208H, FDT208-A
B→
D
→
C
→
A
→
Gas piping
φ15.88(5/8")
Exhaust air opening
for ducting
Fresh air opening
for ducting
Air outlet
Air inlet grille
(Suspension bolts pitch)
(Suspension bolts
pitch)
(Ceiling hole size)
Indication board
(Only case of FDTN type)
Drain hose(Accessories)
(Connectable with VP25)
Space for installation and service
Holes for
tapping screws Holes for
tapping screws
Hole for wiring
Control box
Lug for Suspension bolts
Liquid piping
φ6.35(1/4")
(Max. Drain up)
Obstacle
Suspension bolts
(M10 or M8) 295 ~ 325
700 or more
570
359
430
264
304300
515
800
700
161
99
49 or more
26 215
141
295
336
1000
or more
35
110
90
90
50
70 140
80
87
37100
120
740
680
4-φ4
VIEW A
VIEW B
VIEW D
VIEW C
1000 or more
4-φ4
Decorative Panel

7
Unit : mm
Decorative Panel
VIEW A
VIEW DVIEW C
VIEW B
Space for installation and service
Liquid piping
φ9.52(3/8")
860~890 (Ceiling hole size)
267
310332
675
(Suspension bolts pitch)
637
422 420
400
780 (Suspension bolts pitch )
Fresh air
opening for ducting
Exhaust air
opening for ducting
Drain hose (Accessories)
(Connectable with VP25)
Gas piping
( φ15.88)
(M10 or M8 ×4pcs.)
B→
C
Air inlet grille
Air outlet
630
950
295~325
700
or less
(Max. Drain up)
210
137
187
260
30
45
or more
95
Lug for
suspension bolts
Control box
Hole for wiring
Suspension bolts
A
↑
840
1000
1000
Obstacle or more
or more
55
25
160 33
80
113
140
Holes for
tapping screws
4-φ4
112
100
60
140
42
140
Holes for
tapping screws
6-φ4
D→
↑
Indication boad
(Only case of FDTN type)
Models FDTN258H, 308H, FDT258-A, 308-A

8
Models FDTN408H, 508H, FDT408-A, 508-A
Unit : mm
Decorative Panel
VIEW A
VIEW DVIEW C
VIEW B
Space for installation and service
Liquid piping
φ9.52(3/8")
860~890 (Ceiling hole size)
267
310332
675
(Suspension bolts pitch)
637
422 420
400
780 (Suspension bolts pitch )
Fresh air
opening for ducting
Exhaust air
opening for ducting
Drain hose (Accessories)
(Connectable with VP25)
Gas piping
φ19.05(3/4")
(M10 or M8 ×4pcs.)
B→
C
Air inlet grille
Air outlet
630
950
295~325
700
or less
(Max. Drain up)
270
137
187
320
30
45
or more
95
Lug for
suspension bolts
Control box
Hole for wiring
Suspension bolts
A
↑
840
1000
1000
Obstacle or more
or more
55
25
160 93
80
113
140
Holes for
tapping screws
4-φ4
112
100
60
140
42
140
Holes for
tapping screws
6-φ4
D→
↑
Indication board
(Only case of FDTN type)

9
RCD Remote Control (wired)
Installation, Wiring & Setting
RCD installation
The RCD is a multi function touch pad
controller, with LED display. It should
be located away from direct sunlight,
water splashing, high humidity, or a
heat source. It can be located in
another part of the building if
required. The RCD includes a temperature sensor, which
can be utilised as an alternative to the indoor unit return
air sensor if preferred.
•To install, remove the front panel of the controller
from the back by prizing apart.
•For surface wiring, make a small cut in the flange of
the back, using a sharp knife.
•WIRE ENTRY IS FROM TOP ONLY.
•Fix the back to the wall.
•Connect three wires to XYZ terminal, corresponding
to the XYZ terminals on the indoor unit. ENSURE THE
XYZ CONNNECTIONS ARE WIRED CORRECTLY.
•Use shielded wires, minimum 0.3mm2, for up to 100m
length.
•Refer to Engineering Data Manual for longer extensions
RCD customised setting
On the back of the RCD board is a series of dip-switches
and jumper wires, which allow alteration and elimination
of certain functions and displays. This allows the installer
to customise, or simplify the controller to suit the
application, and the client’s requirements. The RCD includes
an air temperature sensor, which can be utilised as an
alternative to the unit integral return air sensor.
Time clock operation
The RCD includes a 24 hour programmable on/off timer.
The programme is set up by adjusting the display using
the key pad of the controller. Where an external time
control is used (through the CnT port) in preference to
the RCD timer, the 24 hour time clock display can be
removed, to avoid confusion by the user. This is achieved
by cutting jumper wire J3.
Where there is a requirement for a 7-day programmable
timer (supplied by the installer), this should be wired
separately into the CnT port of the indoor unit PCB.
Master / slave control
Where two controllers are wired to one unit (or one group
of units), one is designated the master, the other the
slave. This arrangement may be required in a large
building, where individual remote controls are located in
offices or different areas of a store, and additional
controllers are situated in the building manager’s office.
The unit (or group) will respond to the last command
from either the master or the slave.
In some applications, where the RCD integral sensor is
required to operate the system, it may need to be located
out of reach at high level. The installation of a second RCD
would allow the user to operate and adjust the system
from a remote location, using the master/slave arrangement.
For control operation functions, please refere to page 10
SW1 on Cooling only
off Heat pump
SW2 on Remote sensor enabled
off Remote sensor disabled
SW3 on Power re-start on
off Power re-start off
SW4 on Remote Master
off Remote Slave
J1 Link Return air temp - displayed
No link Return air temp - not displayed
J2 Link Fan display High, Med, Low
No Link Fan display High, Low
J3 Link Timer function displayed
No Link Timer function disabled
J4 Link Swing function displayed
No Link Swing function disabled
RCD master control RCD slave control
Connection to indoor
unit terminals XYZ
Jumper wire
Customise
display settings
Remote Sensor
(alternative)
Dip switch
customise settings

Group control
The RCD can be used as a Group Control for up to 16 units.
The RCD will determine the fan speed, heat / cool / auto
mode, and temperature selection for all units together.
The units will then operate in the same mode, with each
individual temperature sensor independently operating
the heating or cooling of each system.
The indoor unit PCB has an address dial, which must be
adjusted to a group address number for each unit in the
group, i.e. 0,1,2,3, etc. The address setting also provides
a time delay for sequential compressor starts.
Group control wiring
The units in the same Group have control board terminals
X,Y,Z connected in parallel by 3-core screened wiring.
One single controller, or two controllers (master/slave)
are connected to the X,Y,Z wiring.
Compressor delay timer
The address setting of each individual unit within the
group also has the function of providing a delay of 1
second between compressor starts. This is to prevent a
large power surge, which would result from all compressors
starting together.
The delay timer function is set into 8 sequential starts,
with pairs of units starting together.
RCD remote control
Up to 16 units
10
RCD Remote Control (wired)
Installation, Wiring & Setting
Unit
Address
Number
Start delay
interval
(sec.)
0 & 8 0
1 & 9 1
2 & 10 2
3 & 11 3
4 & 12 4
5 & 13 5
6 & 14 6
7 & 15 7

Fault diagnosis
The RCD wired controller includes a fault diagnostic display. For complete information on error codes and
the required rectification, please refer to the Maintenance Data included with the unit instructions.
Error Codes
E1 control wiring broken
pcb defective
E6 indoor heat exchanger thermistor defective
connection to thermistor defective
E7 indoor return air sensor defective
connection to thermistor defective
defective input circuit on pcb
E8 heat overload on indoor heat exchanger
indoor heat exchanger thermistor short circuit
E9 condensate pump wiring disconnected or faulty
float switch defective
defective output circuit on indoor pcb
E57 refrigerant leak
indoor heat exchanger thermistor short circuit
defective thermistor input circuit on pcb
11
RCD Remote Control Functions
FILTER
RESET
CHECK
FAN
SPEED
AUTO
SWING
TIMER
SET
MODE
TEMP
TIME
PROGRAM TIMER
ON OFF
PM
AM
SETTEMP
E
C
Lo
Mi
Hi
FAN
C
CENTER REMOTE FILTER
AUTODRYCOOLFANHOT KEEP
FILTER AUTO LIFT
Filter reset switch
Use this switch to reset (erase) the filter
sign display.
(Press the switch after cleaning the air filter.)
Filter sign
When this sign is indicated, clean the filter.
Remote display
This is displayed when the unit is controlled
with an individual controller during normal operation.
(Also displayed when the air conditioner is stopped.)
Inspection switch
Use this switch when servicing the unit.
Operation mode display
Displays the operation mode that has
been selected.
Fan speed display
Displays the fan speed that has been set.
Operation/
Inspection indicator lamp
During operation: Green lamp flashes.
In case of error: Red lamp flashes.
On/Off switch
Use this switch to start or stop the
air conditioner.First push on the
switch starts the unit and second
push stops it. (The switch can be
operated without opening the cover.)
Fan speed switch
Use this switch to set a fan speed.
Mode switch
Use this switch to select operation
modes.
Cover
Heating
preparation display
Timer switch
Use this switch when selecting contents of timer operation.
Set switch
Use this switch to set a time for the timer.
Temperature/
Time setting switch
Use this switch to set the room
temperature or time on the timer.
Auto swing switch
Use this switch to operate or stop
the swing louver.
Auto swing display
Indicates the swing louver condition.
Setting
temperature display
Displays the temperature
that has been set.
Return air
temperature display
Displays the return air temperature.
Indicated value may be different
from actual reading on a thermometer
or other instrument but this is not
necessarily an error.
Note
Outdoor No.
Central display
This is displayed when the unit is
controlled with the optional central console.
Timer operation display
Contents of timer operation are displayed.
(Also displayed when the air conditioner
is stopped.)

12
FDEN - 8 Series (ceiling)
FDC - 8 Series (outdoor)
SYSTEM REFERENCE 2088 2588 3088 3088
(
3
p
h
)
4088 5088
PERFORMANCE
Cooling performance nom. (1) KW 5.00 5.70 7.10 7.10 10.00 12.50
Cooling U K Conditions (2) KW 4.80 5.47 6.82 6.82 9.60 12.00
Sensible Cooling UK (3) KW 3.51 4.05 5.05 5.05 6.91 8.28
Heating Performance (HP only) KW 5.40 6.10 8.00 8.00 11.20 14.00
ELECTRICAL DATA
System Power connection Mains to outdoor unit first. Interconnecting wiring - 3 wires + Earth, for cooling, 5 wires plus + Earth, for Heat Pump
Run current - cooling A 8.2 9.4 13.9 5.1/ph 7.6/ph 9.3/ph
Start current max. L RA A 44 51 95 45/ph 53/ph 74/ph
Recommended Fuse Rating (Local) (5) A 20 30 30 15/ph 15/ph 20/ph
INDOOR UNIT ref: FDEN 8 Series FDEN208 FDEN258 FDEN308 FDEN308 FDEN408 FDEN508
Dimension - Unit H x W x D mm 184 x 1000 x 650 184 x 1260 x 650 239 x 1260 x 650 239 x 1470 x 650
Net Weight kg 22 27 27 30 34 40
Fan Specification Centrif. fan x 2 Multi-blade centrifugal fan x 4
Motor Rating W 40 x 1 25 x 2 35 x 2 35 x 2 35 + 55 55 x 2
Airflow (6) High / low speed m 3/s 0.23 / 0.16 0.26 / 0.17 0.28 / 0.19 0.28 / 0.19 0.43 / 0.31 0.46 / 0.33
Sound level at 1 metre below high / low dBA 43 / 38 44 / 39 45 / 39 45 / 39 49 / 43 50 / 44
Safety Control Internal thermostat for fan motor. Frost protection thermostat.
Condensate Lift Pump – Max lift mm N /A
Condensate Connection Size o.d. mm 20 20 20 20 20 20
FreshAir Inlet facility Aperture required in rear section of unit – max 10% of unit air volume
ExhaustAir Duct facility N /A
Refrigerant Control Capillary tube.
Pipe Termination Sizes o.d. ins 5/8 5/8 5/8 5/8 3/4 3/4
o.d. ins 1/4 3/8 3/8 3/8 3/8 3/8
Filter Polypropylene net x 2 (Washable) Polypropylene net x 3 (Washable)
Remote Control (wireless infra red) Multi function hand held controller, supplied with wall bracket
OUTDOOR UNIT ref: FDC 8 FDC208 FDC258 FDC308 FDC308
(
3
p
h
)
FDC408 FDC508
TECHNICAL DATA
Dimension - Unit H x W x D mm 690 X880 X290 845 X880 X340 1050X920 X340 1250 X920 X340
Net Weight kg 49 55 74 74 90 101
Fan Specification Pro
p
eller Fan x 1 Pro
p
eller Fan x 2
Motor Rating W 55 X1 55 X1 55 X1 55 X1 40 X2 65 X2
Sound level at 1 metre in front dBA 52 52 52 52 54 55
Refrigerant type R22 OR R407C
Refrigerant factory charge R22 / R407C kg 0.98 / 0.98 1.1 / 1.2 1.4 / 1.75 1.4 / 1.75 1.7 / 2.12 1.9 / 2.58
REFRIGERANT PIPING
Pipe Termination Sizes o.d. ins 5/8 5/8 5/8 5/8 3/4 3/4
o.d. ins 1/4 3/8 3/8 3/8 3/8 3/8
Maximum pipe run m 30 30 50 50 50 50
Max height diff. Outdoor unit above / below m 30 / 15 30 / 15 30 / 15 30 / 15 30 / 15 30 / 15
NOTES 1 Nominal cooling rated at ISO-A, JIS B8616 Outdoor: 35 oC DB / 24oC WB Indoor: 27oC DB / 19oC WB
2 U K Cooling Outdoor: 30oC DB / 20oC WB Indoor: 23oC DB / 17oC WB
3 Sensible Cooling calculated at UK conditions, at standard air volume.
4 Heating Performance rated at: Outdoor 7oC DB / 6oC WB Indoor: 20oC DB
5 Recommendations are for supply to outdoor unit. Use motor rated fuse or MCB. Requirement may vary depending on site conditions.
6 CEN & HEN = 1ph CES & HES = 3ph.
8 Cooling only systems available in R22 models 2088 & 2588. Cooling only available with R22 FDC 6 Series outdoor units, and all R407C FDC 8 Series.
Technical data for R22 and R407C Systems

13
FDEN - 8 Series (ceiling)
FDC - 6 Series (outdoor)
SYSTEM REFERENCE 3086 3086 (3ph) 4086 5086
PERFORMANCE Note
Cooling performance nom. (1) KW 7.10 7.10 10.20 12.50
Cooling UK Conditions (2) KW 6.82 6.82 9.79 12.00
Sensible Cooling UK (3) KW 5.05 5.05 7.05 8.28
Heating Performance (HP only) KW 7.30 7.30 10.50 12.80
ELECTRICAL DATA
System Power connection Mains to outdoor unit first. Interconnecting wiring - 3 wires + Earth, for cooling, 5 wires + Earth, for Heat Pump
Run current - cooling A 15.6 5.3/ph 7.3 9.8
Start current max. L RA A 89 43/ph 45/ph 68/ph
Recommended Fuse Rating (Local) (5) A 30 15/ph 15/ph 20/ph
INDOOR UNIT ref: FDT 8 Series FDEN308 FDEN308 FDEN408 FDEN508
Dimension - Unit H x W x D mm 184 x 1260 x 650 239 x 1260 x 650 239 x 1470 x 650
Net Weight kg 27 27 34 40
Fan Specification Multi-blade centrifugal fan x 4
Motor Rating W 35 x 2 35 x 2 33 + 55 55 x 2
Airflow (6) High / low speed m 3/s 0.28 / 0.19 0.28 / 0.19 0.43 / 0.31 0.46 / 0.33
Sound level at 1 metre below - high / low dBA 43 / 38 43 / 38 49 / 43 50 / 44
Safety Control Internal thermostat for fan motor. Frost protection thermostat.
Condensate Lift Pump – Max lift mm N /A
Condensate Connection Size o.d. mm 20 20 20 20
FreshAir Inlet facility Aperture required in rear section of unit – max 10% of unit air volume
ExhaustAir Duct facility N /A
Refrigerant Control Capillary tube.
Pipe TerminationSizes o.d. ins 5/8 5/8 3/4 3/4
o.d. ins 3/8 3/8 3/8 3/8
Filter Polypropylene net x 2 (Washable) Polypropylene net x 3 (Washable)
Remote Control (wireless infra red) Multi function hand held controller, supplied with wall bracket
OUTDOOR UNIT ref: FDC 6 FDC306 FDC306
(
3
p
h
)
FDC406
(
3
p
h
)
FDC506
(
3
p
h
)
Dimension - Unit H x W x D mm 844 X950 X340 1250 X950 X340
Net Weight kg 69 69 86 91
Fan Specification Propeller Fan x 1 Propeller Fan x 2
Motor Rating W 60 X1 60 X1 60 X2 60 X2
Sound level at 1 metre in front dBA 56 56 57 59
Refrigerant R22 ONLY
Refrigerant factory charge kg 1.3 1.3 1.6 2.3
REFRIGERANT PIPING
Pipe TerminationSizes o.d. ins 5/8 5/8 3/4 3/4
o.d. ins 3/8 3/8 3/8 3/8
Maximum pipe run m 30 30 30 30
Max height diff. Outdoor unit above / below m 15 15 15 15
NOTES 1 Nominal cooling rated at ISO-A, JIS B8616 Outdoor: 35oC DB / 24oC WB Indoor: 27oC DB / 19oC WB
2 UK Cooling Outdoor: 30oC DB / 20oC WB Indoor: 23oC DB / 17oC WB
3 Sensible Cooling calculated at UK conditions, at standard air volume.
4 Heating Performance rated at: Outdoor 7oC DB / 6oC WB Indoor: 20oC DB
5 Power supply to outdoor unit. Use motor rated fuse or MCB. Requirement may vary depending on site conditions.
6 CEN & HEN = 1ph CES & HES = 3ph.
8 Cooling and heat pump systems available in R22 models 2088 & 2588.
Technical data for R22 and R407C Systems

14
Installation of FDEN Ceiling Suspended Unit
Application
The unit is designed for most commercial applications, i.e.
shops, offices, gyms, meeting rooms, bars, restaurants, etc.
It should not be installed in an area contaminated by oil,
chemicals, or an area with steam or excessive humidity, or
hazardous substances, i.e. flammable gases, vapours, resins,
thinners, petroleum, acids.
Do not install adjacent to equipment generating magnetic
waves or high frequency signals, as the generated noise
may cause equipment malfunction.
Unit location
Select a suitable location within the room to allow optimum
air distribution to all parts of the conditioned space. The
rear of the unit can be installed adjacent to a wall (5mm
clearance), allowing pipework and electrical connections
to be concealed.
The unit should be located so as not to cause draft
disturbance to a person located directly in the path of the
air discharge. Please note: Unit sizes 408 and 508 have high
air volume, and are normally suited to retail sites, or large
open plan areas. Consideration must be given to the
discharge air velocity if applying the larger size units to an
office environment.
Installation space
Unit location avoiding obstructions (dim. mm)
Preparation for installation
Drill a hole for the pipework –recommended size 70-86mm
dia. Use pipe sleeve (accessory) if required. Use Template
Sheet to locate positions of suspension bolts. Bolt size M8
or M10. The refrigeration pipework can be routed right,
left, top, or rear.
NOTE: the suspension brackets can be positioned facing
inwards or outwards. Most of the bracket is concealed
if facing inwards. See drawings on page 14 for positions
of bolt fixings. Ensure suspension bolts are securely
fixed into building structure, with a
minimum resistive force of 50kg.
Fix suspension bolts (4 no. M8 or M10 –supplied by installer)
into the building construction, in the required positions.
With the hanging brackets secured to the suspension bolts,
the unit (with side panels removed) can be lifted into
position, onto the hooks of the brackets.
The fixing nuts secure the unit to the brackets. The side
panels are replaced.
Attention must be paid to the level of the unit. There must
be an incline of at least 3mm, to allow drainage of
condensate from the drain tray.
For semi-recessed
installation, a suitable size
opening must be made in
the ceiling. For a solid
ceiling, e.g. plasterboard,
it is necessary to make the
opening wide enough to
allow secure fixing. The
space can be filled after
installation is complete.
Condensate drain
The termination of the drain is a ‘push-on’fitting, 20mm
o.d. The condensate can be connected either at the right
or left. Ensure there is adequate fall (min 1:50) of the
condensate gravity drain. Use rigid drain piping. Please
refer to CONDENSATE DRAINS INSTALLATION, page 23.
The condensate drain must be insulated, to prevent external
condensation.
Condensate pumps
A small kit pump can be fitted into the casing of the air
conditioner if required. The sump/sensor unit should be
carefully installed, ensuring it is lower than the exit
connection of the condensate tray. Where the pump includes
a ‘fail safe’switch, the connection to stop the air conditioner
can be made through the CnT port of the indoor PCB –
terminals 1 & 6. The ‘fail safe’switch must be voltage free.
A connection adaptor, ref: F6001 is available free, from 3D,
allowing easy connection to the CnT port. See p 21 for
instructions.
Electrical installation Please refer to page 21.
0 ~ 3 mm
0 ~ 3 mm
Model 208 258 308 408 / 508
Air throw (metres) 7.5 8.0 9.0 9.5
airflow speed at above distance = 0.5m/s
Safety Warning: Refer to safety data on back cover of this manual

15
FDEN ceiling suspended 208, 258, 308, 408, 508
(1) Indoor unit
Models FDEN208H, 258H, 308H
46 10
Liquid piping
Gas piping
Drain piping connection
Holes for suspension bolt
(12 x 17 x 4 pcs.)
275
650
184
195 (Liq.)
(Gas)
(Drain)
225
248
135
75
7518
570
80
45
34
605 5
195
18
7020
3120
46
37 150 34
94
1244 [984]
1160 [900]
1200 [940]
1260 [1000]
(Holes for suspension bolt)
(Holes for suspension bolt)
The brackets face interior
Side panel
Drain Air inlet grille
Air outlet grille
Air filter
208: ø6.35 (1/4˝)
Liquid piping 258, 308: ø9.52 (3/8˝)
30
55
35
30
20
30
20
10
50
50
10
20
30
15 15
290 135 15
7
Holes for
suspension bolts
(12 ×17 ×4 pcs.)
The brackets face out
When the unit is half
recessed above the ceiling
()
When the unit is suspended
beneath the ceiling
()
(Automatic louver)
Indication board
Gas piping ø15.88 (5/8")
Drain (Connectable with VP20)
Drain piping
connection
Note (1) The slope of drain piping inside the
unit is able to take incline of 10 mm.
75
70 11
18
ref. piping
& wiring
()
drain
piping
()
piping
& wiring
()
piping
& wiring
()
piping
& wiring
()
Space for installation & servicing Piping & wiring draw out holes
Note (1) The [ ] value dimension for models FDEN208H.
100mm
or more 150mm
or more 5mm
or more
300mm or more
Obstacles
Top exit
Right exit
Left exit
Rear exit Left exit
VIEW A
A
↑
Unit: mm

Models FDEN408H, 508H
A
↑
VIEW A
Drain piping
Connection
Note (1) The slope of drain piping inside the
unit is able to take incline of 10 mm.
10
46
80
135275
584 566
17434
570
650
18 75 75 18
196
225
266
(Liq.)
Liquid piping
Gas piping
Holes for suspension bolts
(12 ×17 ×4pcs.)
Drain hole connection
(Gas)
(Drain)
239
150
37
46
20 70 20 31
94
89
Note (1) The [ ] value dimension for models FDEN408H
100mm
min
150mm
min
Obstacles
5mm
min
Top exit
Right exit Rear exit
piping
& wiring
( )
piping
& wiring
( )
piping
& wiring
( )
ref. piping
& wiring
drain
piping
Left exit
Left exit
300mm min
( )
(
)
Ceiling suspension installation
Space for installation & servicing
Piping & wiring draw out holes
The brackets face out
When the unit is half
recessed above the ceiling
( )
The brackets face interior
Side panel 30
30
35
30
55
29
290
20 10
30
2010
15
50
135 15
7
50
15 1451 [1244]
1370 [1160]
1410 [1200]
1470 [1260]
When the unit is sus-
pended beneath the ceiling
Holes for
suspension bolts
Air outlet grille
(Automatic louver)
Indication board
Air inlet grille
Air filter
Drain (Connectable with VP20)
Liquid piping ø9.52 (3/8")
Gas piping ø19.05 (3/4")
Drain
(12 × 17 × 4pcs.)
( )
(Holes for suspension bolt)
(Holes for suspension bolt)
it: mm
16

SYSTEM REFERENCE 2088 2588 3086 3086
(
3
p
h
)
3088 3088
(
3
p
h
)
PERFORMANCE
Cooling performance nom. (1) KW 4.85 5.70 7.10 7.10 7.10 7.10
Cooling U K Conditions (2) KW 4.66 5.47 6.82 6.82 6.82 6.82
Sensible Cooling UK (3) KW 3.41 3.83 5.05 5.05 5.05 5.05
Heating Performance (HP only) KW 5.40 6.10 7.30 7.30 8.00 8.00
ELECTRICAL DATA
System Power connection Mains to outdoor unit first. Interconnecting wiring - 3 wires + Earth, for cooling, 5 wires plus + Earth, for Heat Pump
Run current - cooling A 8.2 9.3 15.5 5.2/ph 13.8 5.4/ph
Start current max. L RA A 44 51 89 43/ph 95 45/ph
Recommended Fuse Rating (Local) (5) A 20 30 30 15/ph 30 20/ph
INDOOR UNIT ref: FDT 8 Series FDKN208 FDKN258 FDKN308 FDKN308 FDKN308 FDKN308
TECHNICAL DATA
Dimension - Unit H x W x D mm 275 x 790 x 179 298 x 940 x 196 298 x 1155 x 196
Net Weight kg 10 11 13.5 13.5
Fan Specification Tangential Fan x 1
Motor Rating W 26 x 1 40 x 1 40 x 1 40 x 1 40 x1 40 x 1
Airflow (6) High / low speed m 3/s 0.27 / 0.16 0.28 / 0.18 0.35 / 0.25 0.35 / 0.25 0.35 / 0.25 0.35 / 0.25
Sound Level at 1 m below/1m front - hi/lo dBA 45 / 38 45 / 38 46 / 40 46 / 40 46 / 40 46 / 40
Safety Control Internal thermostat for fan motor. Frost protection thermostat.
Condensate Lift Pump – Max lift mm N/A
Condensate Connection Size o.d. mm 16 16 16 16 16 16
FreshAir Inlet / Exhaust Air facility N/A
Refrigerant Control Capillary tube.
Pipe Termination Sizes o.d. ins 5/8 5/8 5/8 5/8 5/8 5/8
o.d. ins 1/4 3/8 3/8 3/8 3/8 3/8
Filter Long life filter x 2 (Washable) Long life filter x 3 (Washable)
Remote Control (wireless infra-red) Multi function hand held controller, supplied with wall bracket
OUTDOOR UNIT ref: FDC 8 FDC208 FDC258 FDC306 FDC306
(
3
p
h
)
FDC308 FDC308
(
3
p
h
)
TECHNICAL DATA
Dimension - Unit H x W x D mm 690 X880 X290 845 X880 X340 844X950 X340 845 X880 X340
Net Weight kg 49 55 69 74
Fan Specification Propeller Fan x 1
Motor Rating W 55 X1 55 X1 60 X1 55 X1
Sound level at 1 metre in front dBA 52 52 56 56 52 52
Refrigerant type R22 OR R407C (8 SERIES)
Refrigerant factory charge R22 / R407C kg 0.98 / 0.98 1.1 / 1.2 1.3 / N/A 1.3 / N/A 1.4 / 1.75 1.4 / 1.75
REFRIGERANT PIPING
Pipe Termination Sizes o.d. ins 5/8 5/8 5/8 5/8 3/4 3/4
o.d. ins 1/4 3/8 3/8 3/8 3/8 3/8
Maximum pipe run m 30 30 30 30 50 50
Max height diff. Outdoor unit above / below m 15 / 15 15 / 15 15 / 15 15 / 15 30 / 15 30 / 15
NOTES 1 Nominal cooling rated at ISO-A, JIS B8616 Outdoor: 35oC DB / 24oC WB Indoor: 27oC DB / 19oC WB
2 U K Cooling Outdoor: 30oC DB / 20oC WB Indoor: 23oC DB / 17oC WB
3 Sensible Cooling calculated at UK conditions, at standard air volume.
4 Heating Performance rated at: Outdoor 7oC DB / 6oC WB Indoor: 20oC DB
5 Recommendations are for supply to outdoor unit. Use motor rated fuse or MCB. Requirement may vary depending on site conditions.
CEN & HEN = 1ph CES & HES = 3ph.
Cooling only systems available in R22 models 2088 & 2588. Cooling only available with R22 FDC 6 Series outdoor units, and all R407C FDC 8 Series.
17
FDKN - 8 Series (cassette)
FDC - 6 & 8 Series (outdoor)
6
7
13.5 13.5

18
Application
The unit is designed for most commercial applications,
i.e. shops, offices, gyms, meeting rooms, bars, restaurants,
etc. It should not be installed in an area contaminated
by oil, chemicals, or an area with steam or excessive
humidity, or hazardous substances, i.e. flammable gases,
vapours, resins, thinners, petroleum, acids.
Do not install adjacent to equipment generating magnetic
waves or high frequency signals, as the generated noise
may cause equipment malfunction.
Unit location
Select a suitable location within the room to allow
optimum air distribution to all parts of the conditioned
space. The minimum distance from a wall or obstruction
is 120mm.
There must be sufficient
clearance at the top
(dimension ‘K’) to allow
for the removal of the
casing.
208 - K=65mm 258 - K=90mm 308 - K=90mm
The unit should be located so as not to cause draft
disturbance to a person located directly in the path of the
air discharge.
Preparation for installation
Unpack the unit, taking care not to damage the fascia.
Remove the wall mounting plate and screw to the wall,
ensuring secure fixing to wall structure. Fix one screw
first, and then use a spirit level to locate the mounting
plate horizontally, marking the remaining fixing holes on
the wall, and fix with screws as required.
Connection and routing of pipework
The refrigeration pipework is terminated as two copper
tubes, with flared fittings. The tubes can be bent, and
routed out of the unit at 5 alternative positions, as shown.
The pipes should be bent in the direction required, prior
to the unit being installed.
Condensate hose
The flexible drain hose is located at the bottom rear of
the unit, and can be attached to either the left or right
connections to the drain tray. The spring clip securing the
hose can be easily removed. The drain stub cap must be
fitted to the stub, in place of the hose. The hose should
exit the unit with the refrigeration pipework, ensuring a
sufficient inclination away from the unit –min gradient 1:50.
Condensate pump
If an internal kit type condensate pump is used, it may be
easier to remove the drain hose and to use a short cut
length of insulated hose to the sump/sensor component
of the pump. The drain stub
on the condensate tray is
13mm o.d. Note: condensate
pump to be supplied by the
installer. The installer must
make provision for access to
the condensate pump for
cleaning and servicing.
Further information
Remote control - wireless infra-red page 18
Refrigerant piping installation page 19
Outdoor unit installation and location page 25
Electrical wiring installation page 21
120 or
more
K
120 or
more
Installation of FDKN Wall Mounted Unit
Safety Warning: Refer to safety data on back cover of this manual
The condensate drain
hose can be removed and
repositioned at the
opposite end to allow for
convenient positioning

19
FDKN - 8 Series (wall mounted)
(1) Indoor unit
Model FDKN208H
Space for installation and service
120 or
more
65 or
more
120 or
more
VIEW A (Rear side)
600
Hole on wall for
rear connection
(φ65)
Indoor unit Mounting plate
15 760 15
170 450 170
50 50 50 50
46
9
61
187.5
261.5
36
Hole on wall for
rear connection
(φ65)
67
Drain hose (VP16)
Gas piping
φ15.88(5/8˝)
Liquid piping
82
4.5
390
440
φ6.35(1/4˝)
784
68 26
40
790
275
Remote controller
signal receives
179 3
56
Outlet for piping
(On both side)
49
Lower piping outlet
(Refer to the top view.)
9
Outer for electric
wiring
A
Mounting plate